Corrugated wall plate



June 12,1928. 7 1,673,456

- H. INGERSOLL CORRUGATED WALL PLATE Original Filed June 7, 1923 -M- m A B 5 E54 E15 5 Inven t0).-

Atwme Patented June 12, 1928 UNITED STATES HOWA RD L. INGERSOLL, OF WHITE PLAINS, YORK.

CORRUGATED WALL PLATE.

Original application filed June 7, 1923, Serial No. 643,93d, now Patent No. 1,827,392, dated May 3, 1927. Divided and this application filed April 30, 1925. Serial No. 26,962,

The invention resides in. forming corrugations or embossn'ients in a metallic plate so as to increase its strength to resist exterior loads applied upon it. By forming said corrugations or embossments integral with the plate, considerable fabrication of other parts and riveting is eliminated, and furthermore, the ultimate weight of the structure is retained at a minimum.

Such integrally reinforced plates are especially adaptable for end Walls of railway freight cars where the shifting of the lading causes severe impacts against the end wall. These integral reinforcements also resist the tendency of the plate to buckle. due to the torsional and weaving movements of the car in service. Such a plate may also be used for the floor or roof of a railway car.

Such corrugations or embossments are mechanical beams and can be considered and calculated as such.

When a car is loaded with sand, grain, chats or other plastic material it imposes an equally distributed load upon these beams. There are two Ways of designing a beam to carry an equally distributed so. that its strength at any given point will be commensurate with the bending movement at the point; in other words, so that the fibre stress will he the same at any plane crossing the beam. 7

First: If the beam is maintained at an equal height throughout its length its width must vary so that the contour of the sides form two parabolas having their vertices at the middle of the beam and their bases coincident.

Second: It the beam is maintained atan equal width throughout its length its height must vary so that its contour assumes a semiellipse.

My invention resides in forming an integral en'ibossnient in a plate so that the height and width are proportioned in accordance with the known theories covering beams of equal strength throughout for equally distributed loads.

Another object of the invention is to proshows a section on line 4=l of shows a section on line .5-5. of

. 6 shows an end view of a railway car with my invention applied thereon.

Numeral 10 designates a flat plate having an embossment l2 pressed integrally therein which has a constant width substantially throughout its length and may be provided with terminal portions 13 which vary in width and merge into the plane of the plate.

Figs. 3, 4 and 5 are cross sections showing the constant width of this beam and also show the varying height, this height varying in accordance with known principles.

This is a division of my co-pending application Serial No. 6%,934, filed June 7, 1923.

I claim:

1. A metallicplate having a corrugation formed therein of constant width and with its height varying so that'its contour forms a semi-ellipse, so that said corrugation'is of uniform strength throughoutits length for an equally disributed load.

2. A metallic plate having a corrugation formed therein of constant width and with its height varying so that its contour forms a semi-ellipse, so that said corrugation is of uniform strength throughout its length for an equally distributed load, said corru- I gation having terminal portions merging into the plane of the plate; HOWARD L. INGERSOLL.

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